- AirTech Environmental, Inc.
 - Saint Paul - Providing assessment, testing, training and management services for air quality, asbestos and industrial hygiene and safety issues. - Applied Environmental Sciences, Inc.
- Minneapolis - Environmental, industrial hygiene, and safety consulting; asbestos, indoor air quality, and lead testing; and laboratory services.
- Bioverse, Inc.
- Eden Prairie - Manufactures systems for cleaning lakes, ponds, and small bodies of water, as well as odor control products.
- Carbonair Environmental Systems
- New Hope - Manufacturer and supplier of soil, groundwater, and wastewater remediation equipment. Also provides on-site services.
- Ecosmarte
- Richfield - Offering residential, commercial and industrial systems to ionically purify water.
- Envirobiz
- Minneapolis - An environmental business and technology marketplace. Companies, agencies and associations, news, events and research.
- Interpoll Laboratories, Inc.
- Circle Pines - Providing bioanalytical, chemistry, field and stationary source testing.
- Lemna Corporation
- Saint Paul - Developing and installing wastewater treatment technologies, and developing and implementing environmental and infrastructure projects.
- Liesch Companies
- Plymouth - From designing and overseeing the construction of a wastewater treatment plant to investigating and remediating soil and groundwater impacts.
- Mavo Systems
- Minneapolis - Industrial abatement with expertise in asbestos, lead, PCB and microbial and HVAC cleaning.
- Pace Analytical Services, Inc.
- Minneapolis - Providing a full range of monitoring, sampling and testing services nationwide.
- PureChoice, Inc.
- Edina - Provides customized indoor air quality management programs combining filtration systems with monitoring and maintenance.
- St Croix Sensory, Inc.
- Stillwater - Provides odor evaluation and training services.
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